what timeframe & timezone?
but it looks decent to me. win some loose some. 40% - 60% is decent to me.
i've been boting in different time frame to see what result i can get, and most of my deck so far are between 40-60.
there's a lot of thing that can lower down the numbers, so you also have to keep that in mind.
example; testing a new deck while being lvl 16 will sometimes give you lots of lost to begin with until you reach 19-20.